A corrosion-resistant toughened PVC pipe and its preparation device and preparation process

Abstract

The present application relates to a corrosion-resistant toughened PVC pipe and its preparation device and preparation process. The device includes an extruder, a cooling water tank and a cooling cylinder. A water storage mechanism and a spraying mechanism are arranged on the cooling cylinder; the water storage mechanism includes: a water storage sleeve, a water storage cavity is formed between the water storage sleeve and the outer wall of the pipe to be cooled; a rotating seat, coaxially and rotatably installed in the cooling cylinder, and the water storage sleeve is installed on the rotating seat; a water storage sponge, annular and installed at one end of the water storage sleeve away from the spraying mechanism; a driving component, used to drive the rotating seat to rotate on the cooling cylinder; the spraying mechanism includes: a spraying pipe, connected to an external high-pressure water source; a plurality of nozzles, arranged at equal intervals on the spraying pipe, and the spraying direction of the nozzles points to the water storage cavity. In the present application, cooling water is sprayed into the water storage cavity through the nozzles and forms a cooling water sleeve following the rotation of the water storage sleeve, increasing the contact time between the cooling water and the pipe, improving the cooling effect of the cooling water on the pipe to be cooled, and reducing the consumption of cooling water.

Description

Technical Field

[0001] The present application relates to the technical field of special pipe production, and in particular to a corrosion-resistant toughened PVC pipe and its preparation device and preparation process. Background Art

[0002] The corrosion-resistant toughened PVC pipe is a specially modified PVC pipe. While retaining the original corrosion resistance of the PVC pipe, it improves the impact strength and elongation at break of the pipe by adding toughening agents. For example, by adding modified graphene oxide to acrylate rubber, the toughness of the PVC pipe can be significantly improved. It is mainly used for chemical transportation in the chemical industry, water supply transportation in the water conservancy and fire protection industries, etc., and the general pipe diameter is 200mm - 600mm or even larger. And because additives are added to the raw materials of the corrosion-resistant toughened PVC pipe, the physical properties of this PVC pipe are relatively stable, and some recycled materials can be added for mixed production in actual production, which can not only reduce production costs but also help reduce environmental pollution.

[0003] In the related art, the Chinese patent with the application number CN202211165455.X proposed a corrosion-resistant toughened PVC pipe and its preparation process, belonging to the technical field of PVC pipes, including the following raw materials: polyvinyl chloride resin, acrylate rubber, light calcium carbonate, stabilizer, stearic acid, modified graphene oxide, PE wax, titanium dioxide. This invention enhances the performance of the PVC pipe by using acrylate rubber and modified graphene oxide. The acrylate rubber itself can effectively toughen the PVC. The flexible polymer chains on the surface of the modified graphene oxide can interact with the PVC molecular chains to improve the slipperiness, and can also have a synergistic effect with the acrylate rubber to effectively enhance the toughness of the PVC; the contained haloamine groups and the lamellar graphene oxide are evenly distributed in the pipe material to form a dense physical barrier layer, endowing the pipe with good corrosion resistance.

[0004] When preparing this PVC pipe, the molten mixed material is generally extruded by an extruder and then water-bath cooled and shaped. However, when the pipe diameter is large, the buoyancy of the pipe in the cooling water tank increases, and the shaped pipe may bend, affecting the product quality; if a spray head is used for circumferential cooling of the pipe, the contact time between the sprayed cooling water and the outer wall of the pipe is short, not only the cooling efficiency is low, but also the demand for cooling water is extremely large. Summary of the Invention

[0005] In order to improve the problems of large water consumption and low cooling efficiency during the cooling and shaping of the existing extruded pipes, the present application provides a corrosion-resistant toughened PVC pipe and its preparation device and preparation process.

[0006] The technical solution adopted by a corrosion-resistant toughened PVC pipe preparation device provided in the first aspect of the present application is as follows:

[0007] A corrosion-resistant toughened PVC pipe preparation device includes an extruder and a cooling water tank. A cooling cylinder is covered on the cooling water tank. A water storage mechanism and a spraying mechanism are sequentially arranged on the cooling cylinder along the discharging direction of the extruder.

[0008] The water storage mechanism includes:

[0009] A water storage sleeve, which is coaxially arranged with the cooling cylinder, and its hollow part is for the pipe to be cooled to pass through. A water storage cavity is formed between the outer wall of the water storage sleeve and the pipe to be cooled.

[0010] A rotating seat, which is coaxially and rotatably installed in the cooling cylinder, and the water storage sleeve is installed on the rotating seat.

[0011] A water storage sponge, which is annular and installed at one end of the water storage sleeve away from the spraying mechanism, and the inner diameter of the water storage sponge is not greater than the outer diameter of the pipe to be cooled; and

[0012] A driving component, which is used to drive the rotating seat to rotate on the cooling cylinder.

[0013] The spraying mechanism includes:

[0014] A spray pipe, which is communicated with an external high-pressure water source;

[0015] Nozzles, which are provided with a plurality of and are equally spaced on the spray pipe. The nozzles are communicated with the spray pipe, and the spraying direction of the nozzles points to the water storage cavity.

[0016] Furthermore, a transition cone sleeve is connected between the water storage sleeve and the rotating seat, and the inner wall of the transition cone sleeve is flared along the discharging direction of the extruder.

[0017] Furthermore, a plurality of water stirring structures arranged along the axial direction of the water storage sleeve are fixedly connected to the inner wall of the water storage sleeve, and the height of the water stirring structure along the radial direction of the water storage sleeve is less than the thickness of the annular water storage cavity.

[0018] Furthermore, the water stirring structure is set as a combination of one or two of water stirring bars and a plurality of water stirring protrusions.

[0019] Furthermore, the water stirring structure includes a plurality of the water stirring protrusions on the side close to the water storage sponge and a plurality of the water stirring bars on the side away from the water storage sponge, and the water stirring bars are spirally arranged;

[0020] When the plurality of water stirring bars rotate following the water storage sleeve, they are used to drive the cooling water in the water storage cavity to surge towards the direction close to the water storage sponge.

[0021] Furthermore, a plurality of water permeable holes are formed through the circumferential side of one end of the water storage sleeve close to the water storage sponge.

[0022] Furthermore, a plurality of bimetallic sheets corresponding to the plurality of water permeable holes are fixedly connected to the outer wall of the water storage sleeve. One end of the bimetallic sheet is fixedly connected to the outer wall of the water storage sleeve, and the other end is attached to the outer wall of the water storage sleeve and shields the corresponding water permeable hole.

[0023] After the bimetallic sheet contacts the cooling water with a temperature higher than the set temperature seeping out of the water permeable hole, it bends away from the water storage sleeve.

[0024] Furthermore, a clamping sleeve for embedding the water storage sponge is fixedly connected to the inner wall of the water storage sleeve.

[0025] A preparation method of a corrosion-resistant toughened PVC pipe provided in the second aspect of the present application adopts the following technical solution:

[0026] A preparation method of a corrosion-resistant toughened PVC pipe, based on the above-mentioned corrosion-resistant toughened PVC pipe preparation device, includes the following steps:

[0027] S1. After mixing the new materials according to the ratio, mix them with the recycled materials after crushing to form a mixture, and put the mixture into the extruder for extrusion.

[0028] S2. Traction the pipe extruded by the extruder to pass through the cooling cylinder, and keep the pipe to be cooled coaxial with the cooling cylinder.

[0029] S3. Start the spraying mechanism and the water storage mechanism, so that the cooling water sprayed by the plurality of nozzles flushes into the water storage cavity, and a cooling water jacket surrounding the pipe to be cooled is formed in the water storage cavity by means of the rotation of the water storage sleeve.

[0030] S4. As the pipe to be cooled continues to be output, the cooling water jacket in the water storage cavity continuously and efficiently cools and shapes the pipe to be cooled.

[0031] A corrosion-resistant toughened PVC pipe provided in the third aspect of the present application adopts the following technical solution:

[0032] A corrosion-resistant toughened PVC pipe, prepared based on the above-mentioned preparation method of a corrosion-resistant toughened PVC pipe, the new materials thereof include the following raw materials in parts by weight: 100 parts of polyvinyl chloride resin, 10 - 12 parts of acrylate rubber, 25 - 28 parts of light calcium carbonate, 3.5 - 4.5 parts of stabilizer, 0.9 - 1 part of stearic acid, 1.6 - 2 parts of modified graphene oxide, 0.9 - 1.1 parts of PE wax, 1.8 - 2.2 parts of titanium dioxide.

[0033] In summary, the beneficial technical effects of the present application are as follows:

[0034] 1. When the driving component drives the rotating seat to rotate, the water storage sleeve is driven to rotate at a high speed. The cooling water ejected at a high speed by multiple nozzles enters the water storage cavity between the water storage sleeve and the pipe to be cooled. When the water storage sleeve rotates, it can stir the cooling water in the water storage cavity to a certain extent, so that the cooling water in the water storage cavity can follow the rotation as much as possible and form a water cooling sleeve surrounding the outer circumference of the pipe to be cooled, which can significantly increase the contact time between the cooling water and the pipe to be cooled, thereby improving the cooling effect of the cooling water on the pipe to be cooled, reducing the amount of cooling water used, saving water resources and reducing production costs;

[0035] 2. When the water storage sleeve rotates at a high speed, multiple water stirring bars and multiple water stirring protrusions rotate with the water storage sleeve. When the multiple water stirring bars rotate, on the one hand, they can drive the cooling water in the water storage cavity to rotate to form a water cooling sleeve and maintain the shape of the water cooling sleeve; on the other hand, they can transport the cooling water ejected by the nozzles at the port of the water storage sleeve to the water storage sponge, forming a water flow reverse to the advancing direction of the pipe to be cooled, which can promote the cooling effect of the cooling water on the pipe to be cooled to a certain extent. At the same time, when the multiple water stirring protrusions rotate with the water storage sleeve, they strongly stir the cooling water transported by the multiple water stirring bars to form a strong cooling area for the pipe to be cooled;

[0036] 3. There are always nozzles delivering new cooling water at one end of the water storage sleeve far from the water storage sponge. Therefore, the water temperature at the end of the water cooling sleeve formed in the water storage cavity close to the water storage sponge is much higher than that at the end far from the water storage sponge, which can form a good cooling and temperature reduction gradient and prevent the pipe to be cooled from being suddenly cooled and affecting the forming quality;

[0037] 4. Affected by the centrifugal force when the water storage sleeve rotates, the heated cooling water that enters the deep part of the water storage cavity completes the cooling process, and most of it passes through the water permeable holes on the water storage sleeve and is discharged. In this way, a complete circulation path of the cooling water in the water storage cavity can be formed, so that the low-temperature cooling water can continuously flow into the water storage cavity to cool the pipe to be cooled and then be discharged, greatly improving the cooling efficiency of the pipe to be cooled. At the same time, the cooling water in the water storage cavity forms a water cooling sleeve, increasing the contact time with the cooling pipe and also reducing the amount of cooling water used;

[0038] 5. By setting the bimetallic strip, the water permeable holes can be changed from closed to open, and the opening size of the water permeable holes can be adjusted in real time. Moreover, this adjustment is automatically carried out based on the water temperature of the cooled water after heating at the end of the water storage cavity close to the water storage sponge. When the water temperature at this place is relatively low, the heated cooled water can still cool the pipe to be cooled to a certain extent. When the water temperature at this place rises to the set value, the bimetallic strip deforms, causing the water permeable holes to open, and the overheated cooled water can be discharged in time. Moreover, the higher the water temperature at this place, the larger the opening amplitude of the water permeable holes, and the higher the drainage efficiency of the overheated cooled water. Therefore, through this automatic dynamic adjustment, the cooling uniformity of the pipe to be cooled can be effectively ensured, and the cooling and forming quality of the pipe to be cooled can be prevented from being affected by the cooled water with sudden temperature changes. Brief Description of the Drawings

[0039] Figure 1 is the overall structural schematic diagram of the embodiment of the present application;

[0040] Figure 2 is the sectional structural schematic diagram of the embodiment of the present application;

[0041] Figure 3 is Figure 2 the partial enlarged schematic diagram of part A in

[0042] Description of the Reference Numerals:

[0043] 1. Extruder;

[0044] 2. Cooling water tank;

[0045] 3. Cooling cylinder; 31. Water falling port;

[0046] 4. Water storage sleeve; 41. Water storage sponge; 42. Water storage cavity; 43. Water permeable hole; 44. Bimetallic strip; 45. Clamping sleeve;

[0047] 51. Rotating seat; 52. External gear ring; 53. Driving gear; 54. Driving motor; 55. Transition cone sleeve;

[0048] 61. Spraying pipe; 62. Nozzle;

[0049] 71. Water stirring bar; 72. Water stirring protrusion. Detailed Embodiment

[0050] The technical solutions of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0051] This embodiment of the present application discloses a preparation device for corrosion-resistant toughened PVC pipes. Refer to Figure 1 and Figure 2 , which includes an extruder 1 and a cooling water tank 2. A cooling cylinder 3 is covered on the cooling water tank 2. Along the discharging direction of the extruder 1 on the cooling cylinder 3, a water storage mechanism and a spraying mechanism are sequentially arranged. A water falling port 31 corresponding to the cooling water tank 2 is opened at the lower part of the cooling cylinder 3 for the cooling water to flow back and be recycled.

[0052] The water storage mechanism includes:

[0053] A water storage sleeve 4, which is coaxially arranged with the cooling cylinder 3. Its hollow part is for the pipe to be cooled to pass through. A water storage cavity 42 is formed between the outer wall of the water storage sleeve 4 and the outer wall of the pipe to be cooled. The thickness of the annular water storage cavity 42 is not less than 20 mm;

[0054] A rotating seat 51, which is coaxially and rotatably installed in the cooling cylinder 3. The water storage sleeve 4 is coaxially installed on the rotating seat 51;

[0055] A water storage sponge 41, which is annular and installed at one end of the water storage sleeve 4 away from the spraying mechanism. The inner diameter of the water storage sponge 41 is not greater than the outer diameter of the pipe to be cooled; and

[0056] A driving component, which is used to drive the rotating seat 51 to rotate on the cooling cylinder 3 with the central axis of the cooling cylinder 3 as the rotation axis.

[0057] The spraying mechanism includes:

[0058] A spraying pipe 61, which is communicated with an external high-pressure water source. Specifically, it is annular and coaxial with the cooling cylinder 3. The spraying pipe 61 is installed on the inner wall of the cooling cylinder 3;

[0059] Nozzles 62, a plurality of which are arranged at equal intervals on the spraying pipe 61. The nozzles 62 are communicated with the spraying pipe 61, and the spraying direction of the nozzles 62 points to the water storage cavity 42. And to ensure that the water volume in the water storage cavity 42 is sufficient, the number of the nozzles 62 is not less than 8.

[0060] In this way, when the new materials for preparing corrosion-resistant toughened PVC pipes are mixed evenly according to the ratio, and then mixed with the recycled materials crushed into powder to obtain a mixture, the mixture is put into the extruder 1 for extrusion. The extruded pipe is pulled to pass through the hollow part of the water storage sleeve 4. Then, the external high-pressure water source is conveyed into the spraying pipe 61 and sprayed out at high speed through a plurality of nozzles 62. The cooling water sprayed out by the nozzles 62 enters the water storage cavity 42 between the water storage sleeve 4 and the pipe to be cooled. The water storage sponge 41 can seal one end of the water storage cavity 42 away from the nozzles 62 to avoid a large amount of direct outflow of the cooling water in the water storage cavity 42 from the end, which can increase the contact time between the cooling water and the pipe to be cooled to a certain extent and improve the cooling efficiency.

[0061] Meanwhile, when the driving component drives the rotating seat 51 to rotate, it drives the water storage sleeve 4 to rotate at a high speed. When the water storage sleeve 4 rotates, it can agitate the cooling water in the water storage cavity 42 to a certain extent, so that the cooling water in the water storage cavity 42 can follow the rotation as much as possible and form a cooling water sleeve surrounding the outer periphery of the pipe to be cooled, which can further significantly increase the contact time between the cooling water and the pipe to be cooled, thereby improving the cooling effect of the cooling water on the pipe to be cooled, reducing the amount of cooling water used, saving water resources and reducing production costs.

[0062] Specifically, to further ensure the retention amount of the cooling water sleeve in the water storage cavity 42 and the wrapping effect on the pipe to be cooled, referring to Figure 2 and Figure 3 , a plurality of water stirring structures arranged along the axial direction are fixedly connected to the inner wall of the water storage sleeve 4, and the height of the water stirring structure along the radial direction of the water storage sleeve 4 is less than the thickness of the annular water storage cavity 42; the water stirring structure is set as a combination of one or two of the water stirring bars 71 and a plurality of water stirring protrusions 72. For example, only the water stirring protrusions 72 are arranged on the inner wall of the water storage sleeve 4. By arranging a plurality of water stirring protrusions 72, the disordered disturbance of the cooling water in the water storage cavity 42 can be promoted, and to a certain extent, the cooling water sleeve can be driven to follow the rotation of the water storage sleeve 4 and maintain a relatively complete thick-walled cylindrical shape to ensure the cooling effect on the pipe to be cooled; or, only the water stirring bars 71 are arranged on the inner wall of the water storage sleeve 4, and the water stirring bars 71 can form a relatively strong stirring effect on the cooling water in the water storage cavity 42, so that the cooling water sleeve follows the rotation of the water storage sleeve 4 more obviously and can greatly promote the shape maintenance of the cooling water sleeve; or it is set as a combination of the two to take into account the promotion of the disordered disturbance of the cooling water and the shape maintenance of the cooling water sleeve.

[0063] In a specific embodiment, referring to Figure 2 and Figure 3 , the water stirring structure includes a plurality of water stirring protrusions 72 on the side close to the water storage sponge 41 and a plurality of water stirring bars 71 on the side far from the water storage sponge 41. The water stirring protrusions 72 are in the shape of a hemisphere, a semi-ellipsoid, a water droplet, a cone, etc.; the plurality of water stirring bars 71 are circumferentially arranged at equal intervals around the axis of the water storage sleeve 4, and the water stirring bars 71 are arranged in a spiral shape;

[0064] When the plurality of water stirring bars 71 rotate with the water storage sleeve 4, they are used to drive the cooling water in the water storage cavity 42 to surge towards the direction close to the water storage sponge 41.

[0065] Thus, when the water storage sleeve 4 rotates at a high speed, the multiple water stirring bars 71 and the multiple water stirring protrusions 72 rotate following the water storage sleeve 4. When the multiple water stirring bars 71 rotate, on the one hand, they can drive the cooling water in the water storage cavity 42 to rotate to form a cooling water sleeve and maintain the shape of the cooling water sleeve; on the other hand, they can convey the cooling water sprayed by the nozzle 62 at the port of the water storage sleeve 4 towards the water storage sponge 41, forming a water flow reverse to the advancing direction of the pipe to be cooled, which can, to a certain extent, promote the cooling effect of the cooling water on the pipe to be cooled. Meanwhile, when the multiple water stirring protrusions 72 rotate following the water storage sleeve 4, they strongly stir the cooling water conveyed by the multiple water stirring bars 71 to form a strong cooling area for the pipe to be cooled.

[0066] Among them, since there is always the nozzle 62 delivering new cooling water at the end of the water storage sleeve 4 far from the water storage sponge 41, the water temperature at the end of the cooling water sleeve formed in the water storage cavity 42 close to the water storage sponge 41 is much higher than that at the end far from the water storage sponge 41, which can form a good cooling and temperature reduction gradient and prevent the pipe to be cooled from being quenched and affecting the forming quality.

[0067] However, although the water storage sponge 41 allows a part of the heated cooling water to flow through, the flow rate is small, and the relatively hot heated cooling water accumulated in the closed end of the water storage sleeve 4 for a long time will instead affect the cooling effect on the pipe to be cooled.

[0068] For this reason, referring to Figure 2 and Figure 3 , a plurality of water permeable holes 43 are penetrated and opened on the circumferential side of the water storage sleeve 4 near the water storage sponge 41. The full-load water permeable flow rate of the plurality of water permeable holes 43 is less than the total spraying flow rate of the plurality of nozzles 62. Specifically, the distribution area of the plurality of water stirring protrusions 72 along the axial direction of the water storage sleeve 4 is larger than the distribution area of the plurality of water permeable holes 43 along the axial direction of the water storage sleeve 4.

[0069] In this way, when the water storage sleeve 4 rotates, with the help of the multiple spiral-shaped water stirring bars 71, the cooling water sprayed by the nozzle 62 into the water storage cavity 42 can be conveyed towards the end reverse to the advancing direction of the pipe to be cooled. This cooling water flow can achieve efficient cooling of the pipe to be cooled and be heated. The heated cooling water is used for the last-stage cooling of the pipe to be cooled under the agitation of the multiple water stirring protrusions 72; then, affected by the centrifugal force when the water storage sleeve 4 rotates, most of this part of the heated cooling water completes the cooling process and passes through the water permeable holes 43 on the water storage sleeve 4 and is discharged. In this way, a complete circulation path of the cooling water in the water storage cavity 42 can be formed, enabling the low-temperature cooling water to continuously flow into the water storage cavity 42 to cool the pipe to be cooled and then be discharged, greatly improving the cooling efficiency of the pipe to be cooled. At the same time, the cooling water in the water storage cavity 42 forms a cooling water sleeve, increasing the contact time with the cooling pipe and also reducing the consumption of the cooling water.

[0070] In order to make full use of the cooling effect of the cooling water and prevent the low-temperature cooling water that does not meet the discharge standard from being directly discharged from the water permeable holes 43 under the action of centrifugal force, referring to Figure 2 and Figure 3 , a plurality of bimetallic strips 44 corresponding to the plurality of water permeable holes 43 are fixedly connected to the outer wall of the water storage sleeve 4. One end of the bimetallic strip 44 is fixedly connected to the outer wall of the water storage sleeve 4, and the other end fits against the outer wall of the water storage sleeve 4 and shields the corresponding water permeable hole 43; the water permeable hole 43 can be set as a long hole arranged along the length direction of the bimetallic strip 44.

[0071] After the bimetallic strip 44 contacts the cooling water with a water temperature higher than the set temperature seeping out from the water permeable hole 43, it bends away from the water storage sleeve 4. Specifically, the bimetallic strip 44 can be composed of nickel-iron alloy and brass, and can produce obvious deformation between 40°C and 60°C. During installation, the brass side faces the water permeable hole 43, so that the heated cooling water contacts the brass first, making the side of the bimetallic strip 44 with brass expand with a larger deformation amount, and then making the bimetallic strip 44 warp, releasing the closure of the water permeable hole 43 and exposing more of the water permeable hole 43.

[0072] Thus, by means of the setting of the bimetallic strip 44, the water permeable hole 43 can be changed from closed to open, and the opening size of the water permeable hole 43 can be adjusted in real time, and this adjustment is automatically carried out based on the water temperature of the heated cooling water at one end of the water storage cavity 42 close to the water storage sponge 41. When the water temperature here is relatively low, the heated cooling water can still cool the pipe to be cooled to a certain extent; when the water temperature here rises to the set value, the bimetallic strip 44 deforms, making the water permeable hole 43 open, and these overheated cooling waters can be discharged in time. Moreover, the higher the water temperature here, the larger the opening amplitude of the water permeable hole 43, and the higher the drainage efficiency of the overheated cooling water. Therefore, through this automatic dynamic adjustment, the cooling uniformity of the pipe to be cooled can be effectively ensured, and the cooling and forming quality of the pipe to be cooled is prevented from being affected by the cooling water with sudden changes in temperature.

[0073] In addition, referring to Figure 2 and Figure 3 , a clamping sleeve 45 for embedding the water storage sponge 41 is fixedly connected to the inner wall of the water storage sleeve 4 to facilitate the replacement of the water storage sponge 41, so as to prevent the water storage sponge 41 from becoming hard after long-term contact with overheated cooling water and scratching the outer wall of the pipe to be cooled. A transition cone sleeve 55 is connected between the water storage sleeve 4 and the rotating seat 51. The inner wall of the transition cone sleeve 55 is flared along the discharging direction of the extruder 1. The transition cone sleeve 55 is fixedly connected to the water storage sleeve 4 but can be detachably installed on the rotating seat 51, so as to facilitate the replacement of water storage sleeves 4 of different sizes when cooling pipes of different sizes.

[0074] At the same time, referring to Figure 1 and Figure 2The above-mentioned driving assembly includes an outer ring gear 52 coaxially fixed to a rotating seat 51, a driving gear 53 rotatably arranged outside the cooling cylinder 3, and a driving motor 54 installed outside the cooling cylinder 3. The driving motor 54 is used to drive the driving gear 53 to rotate. The driving gear 53 is meshingly connected with the outer ring gear 52. The rotating seat 51 is rotatably installed on the end surface of the cooling cylinder 3 through a bearing.

[0075] The present application embodiment discloses a method for preparing a corrosion-resistant toughened PVC pipe. Based on the above-mentioned corrosion-resistant toughened PVC pipe preparation device, refer to Figure 1 and Figure 2 , which comprises the following steps:

[0076] S1. After mixing the new material according to the ratio, it is mixed with the crushed recycled material to form a mixture, and the mixture is put into the extruder 1 for extrusion;

[0077] S2. The pipe extruded from the extruder 1 is pulled through the cooling cylinder 3, and the pipe to be cooled is kept coaxial with the cooling cylinder 3;

[0078] S3. Start the spray mechanism and the water storage mechanism, so that the cooling water sprayed from the multiple nozzles 62 is flushed into the water storage chamber 42, and the cooling water jacket surrounding the pipe to be cooled is formed in the water storage chamber 42 by the rotation of the water storage jacket 4;

[0079] S4. As the pipe to be cooled is continuously output, the cooling water jacket in the water storage chamber 42 continues to efficiently cool and shape the pipe to be cooled.

[0080] The embodiment of the present application discloses a corrosion-resistant toughened PVC pipe, which is prepared by the above-mentioned corrosion-resistant toughened PVC pipe preparation method. The new material includes the following raw materials in parts by weight: 100 parts of polyvinyl chloride resin, 10-12 parts of acrylic rubber, 25-28 parts of light calcium carbonate, 3.5-4.5 parts of stabilizer, 0.9-1 part of stearic acid, 1.6-2 parts of modified graphene oxide, 0.9-1.1 parts of PE wax, and 1.8-2.2 parts of titanium dioxide.

[0081] The implementation principle of the corrosion-resistant toughened PVC pipe preparation device of the present application embodiment is:

[0082] The pipe extruded from the extruder 1 is pulled through the hollow part of the water storage jacket 4, and then the external high-pressure water source is transported to the spray pipe 61 and sprayed out at high speed through multiple nozzles 62. The cooling water sprayed from the nozzles 62 enters the water storage chamber 42 between the water storage jacket 4 and the pipe to be cooled. The water storage sponge 41 can seal the end of the water storage chamber 42 away from the nozzle 62 to a certain extent, avoiding the cooling water in the water storage chamber 42 to flow out directly from the end in large quantities, which can increase the contact time between the cooling water and the pipe to be cooled to a certain extent, thereby improving the cooling efficiency.

[0083] Meanwhile, when the driving component drives the rotating seat 51 to rotate, it drives the water storage sleeve 4 to rotate at a high speed. When the water storage sleeve 4 rotates, it can agitate the cooling water in the water storage cavity 42 to a certain extent, so that the cooling water in the water storage cavity 42 can follow the rotation as much as possible and form a cooling water sleeve around the outer periphery of the pipe to be cooled, which can further significantly increase the contact time between the cooling water and the pipe to be cooled, thereby improving the cooling effect of the cooling water on the pipe to be cooled, reducing the amount of cooling water used, saving water resources and reducing production costs.

[0084] When the water storage sleeve 4 rotates at a high speed, the plurality of water stirring bars 71 and the plurality of water stirring protrusions 72 rotate with the water storage sleeve 4. When the plurality of water stirring bars 71 rotate, on the one hand, they can drive the cooling water in the water storage cavity 42 to rotate to form a cooling water sleeve and maintain the shape of the cooling water sleeve; on the other hand, they can convey the cooling water sprayed by the nozzle 62 at the port of the water storage sleeve 4 to the water storage sponge 41, forming a water flow reverse to the traveling direction of the pipe to be cooled, which can promote the cooling effect of the cooling water on the pipe to be cooled to a certain extent. Meanwhile, when the plurality of water stirring protrusions 72 rotate with the water storage sleeve 4, they strongly stir the cooling water conveyed by the plurality of water stirring bars 71 to form a strong cooling area for the pipe to be cooled.

[0085] Moreover, affected by the centrifugal force when the water storage sleeve 4 rotates, most of this part of the cooled water after the temperature rise passes through the water permeable holes 43 on the water storage sleeve 4 and is discharged. In this way, a complete circulation path of the cooling water in the water storage cavity 42 can be formed, enabling the low-temperature cooling water to continuously flow into the water storage cavity 42 to cool the pipe to be cooled and then be discharged, greatly improving the cooling efficiency of the pipe to be cooled. At the same time, the cooling water in the water storage cavity 42 forms a cooling water sleeve, increasing the contact time with the cooling pipe and also reducing the amount of cooling water used.

[0086] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the art to which this application belongs. The words "first", "second", "third" and similar terms used in the specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. The words such as "a" or "an" do not denote a quantity limitation either, but mean that there is at least one. The words such as "comprising" or "including" mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms such as "upper", "lower", "left", "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0087] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A corrosion-resistant toughened PVC pipe preparation device, comprising an extruder (1) and a cooling water tank (2), characterized in that: A cooling cylinder (3) is provided on the upper cover of the cooling water tank (2), and a water storage mechanism and a spray mechanism are sequentially provided on the cooling cylinder (3) along the discharge direction of the extruder (1); The water storage mechanism comprises: A water storage jacket (4) is coaxially arranged with the cooling cylinder (3), wherein the hollow portion thereof allows the pipe to be cooled to pass through, and a water storage cavity (42) is formed between the water storage jacket (4) and the outer wall of the pipe to be cooled; A rotating seat (51) is coaxially rotatably mounted in the cooling cylinder (3), and the water storage jacket (4) is mounted on the rotating seat (51); A water storage sponge (41) is annular and mounted on an end of the water storage jacket (4) away from the spray mechanism, the inner diameter of the water storage sponge (41) being no larger than the outer diameter of the pipe to be cooled; and A driving assembly, used for driving the rotating seat (51) to rotate on the cooling cylinder (3); The spray mechanism comprises: A spray pipe (61) connected to an external high-pressure water source; A plurality of nozzles (62) are provided and are distributed at equal intervals on the spray pipe (61); the nozzles (62) are connected to the spray pipe (61), and the spraying direction of the nozzles (62) points to the water storage chamber (42).

2. The corrosion-resistant toughened PVC pipe preparation device according to claim 1, characterized in that: A transition cone sleeve (55) is connected between the water storage sleeve (4) and the rotating seat (51), and the inner wall of the transition cone sleeve (55) is in a flared shape along the discharge direction of the extruder (1).

3. The corrosion-resistant toughened PVC pipe preparation device according to claim 1, characterized in that: A plurality of water stirring structures arranged along the axial direction are fixedly connected to the inner wall of the water storage jacket (4), and the height of the water stirring structures along the radial direction of the water storage jacket (4) is less than the thickness of the annular water storage cavity (42).

4. The corrosion-resistant toughened PVC pipe preparation device according to claim 3, characterized in that: The water stirring structure is configured as one of a water stirring strip (71) and a plurality of water stirring protrusions (72), or a combination of both.

5. The corrosion-resistant toughened PVC pipe preparation device according to claim 4, characterized in that: The water stirring structure comprises a plurality of water stirring protrusions (72) close to a side of the water storage sponge (41) and a plurality of water stirring strips (71) away from a side of the water storage sponge (41), wherein the water stirring strips (71) are arranged in a spiral shape; The plurality of water stirring bars (71) are used to drive the cooling water in the water storage chamber (42) to surge in a direction close to the water storage sponge (41) when rotating along with the water storage jacket (4).

6. The corrosion-resistant toughened PVC pipe preparation device according to claim 5, characterized in that: A plurality of water-permeable holes (43) are formed through the periphery of one end of the water storage sleeve (4) close to the water storage sponge (41).

7. The corrosion-resistant toughened PVC pipe preparation device according to claim 6, characterized in that: A plurality of bimetallic strips (44) corresponding to the plurality of water permeable holes (43) are fixedly connected to the outer wall of the water storage jacket (4); one end of the bimetallic strip (44) is fixedly connected to the outer wall of the water storage jacket (4), and the other end is attached to the outer wall of the water storage jacket (4) and covers the corresponding water permeable holes (43); The bimetallic strip (44) bends in a direction away from the water storage jacket (4) after contacting cooling water having a temperature greater than a set temperature that seeps out of the water permeable hole (43).

8. The corrosion-resistant toughened PVC pipe preparation device according to claim 1, characterized in that: A clamping sleeve (45) for embedding the water storage sponge (41) is fixedly connected to the inner wall of the water storage sleeve (4).

9. A method for preparing a corrosion-resistant toughened PVC pipe, based on a corrosion-resistant toughened PVC pipe preparation device as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Mixing the new materials according to the proportion, and then mixing with the crushed recycled materials to form a mixture, and feeding the mixture into the extruder (1) for extrusion; S2. pulling the tube extruded by the extruder (1) through the cooling cylinder (3), and keeping the tube to be cooled coaxial with the cooling cylinder (3); S3. activating the spray mechanism and the water storage mechanism, so that the cooling water sprayed from the plurality of nozzles (62) is flushed into the water storage chamber (42), and a cooling water jacket surrounding the pipe to be cooled is formed in the water storage chamber (42) by means of the rotation of the water storage jacket (4); S4. As the pipe to be cooled is continuously output, the cooling water jacket in the water storage chamber (42) continues to efficiently cool and shape the pipe to be cooled.

10. A corrosion-resistant toughened PVC pipe, prepared by the method for preparing a corrosion-resistant toughened PVC pipe according to claim 9, characterized in that: The new material includes the following raw materials in parts by weight: 100 parts of polyvinyl chloride resin, 10-12 parts of acrylic rubber, 25-28 parts of light calcium carbonate, 3.5-4.5 parts of stabilizer, 0.9-1 part of stearic acid, 1.6-2 parts of modified graphene oxide, 0.9-1.1 parts of PE wax and 1.8-2.2 parts of titanium dioxide.

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